<?php

$data = '<br>Each<br/>New<br />Line'; 
$new  = strip_tags($data, '<br>'); 
var_dump($new);  // OUTPUTS string(21) "<br>EachNew<br />Line" 
echo "<hr>";

$data = '<br>Each<br/>New<br />Line'; 
$new  = strip_tags($data, '<br/>'); 
var_dump($new); // OUTPUTS string(16) "Each<br/>NewLine" 
echo "<hr>";

$data = '<br>Each<br/>New<br />Line'; 
$new  = strip_tags($data, '<br />'); 
var_dump($new); // OUTPUTS string(11) "EachNewLine" 
echo "<hr>";

$data = '<br>Each<br/>New<br />Line'; 
$new  = strip_tags($data); 
var_dump($new); // OUTPUTS string(11) "EachNewLine" 
echo "<hr>";

?>